Marking apparatus



June 23, 1964 WORTH 3,138,098

MARKING APPARATUS Original Filed May 23, 1958 3 Sheets-Sheet l I22 I48I24 I 204 I34 I08 I46 I58 I50 all Id?! INVENTOR.

June 23, 1964 F. c. WORTH 3,138,098

MARKING APPARATUS Original Filed May 23, 1958 3 Sheets-Sheet 2 DEE: 2

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MARKING APPARATUS Original Filed May 25, 1958 3 Sheets-Sheet 3 Fun-5.3

INVENTOR. FJ AA/c/S C MRTH United States Patent 3,138,098 MARKENGAPPARATUS Francis (J. Worth, Ridgewood, N.Y., assignor to AdolphGottscho, Inc, llilisitle, NJ, a corporation of New York Originalapplication May 23, 195$, Ser. No. 737,393, now Patent No. 2,@%,illl5,dated Aug. 15, 1261. Divided and this application lune 12, 1961, Ser.No. 116,585

2 Claims. (Cl. 101-227) This invention relates generally to markingapparatus, and more particularly is directed to a marking apparatuselfective to intermittently apply markings to a continuous web or sheet,for example, to apply markings to successive sections or lengths of acontinuous web of wrapping material which are to be cut from the latterin a conventional wrapping machine. This application is a division of myco-pending application, Serial No. 737,393, filed May 23, 1958, now US.Patent No. 2,996,005.

It is an object of the invention to provide marking apparatus of thedescribed character which is effective to apply inked impressions to thecontinuous web of sheet material fed to an existing wrapping machine orthe like, and wherein the marking apparatus can be installed withoutrequiring modification or alteration of the existing Wrapping machine,while the marking apparatus is made to operate in synchronism with theoperation of the wrapping machine in cutting off successive sections orlengths of the continuous web of Wrapping material.

Another object is to provide marking apparatus of the describedcharacter that is easily adjustable across the continuous web ofwrapping material fed to the associated wrapping machine in order topermit the inked impressions to be applied at any desired lateralposition on successive sections of the web.

In accordance with an aspect of the invention, a marking apparatusincludes an inking roll rotatably dipping into an ink fountain orreservoir and in rolling contact with a metering roll which is, in turn,disposed for rolling contact with the raised marking surfaces of typeelements or logotype mounted on a portion of the periphery of the diewheel. The inking roll and the shaft of the die wheel are positivelydriven, while the metering roll is freely rotatable and is frictionallydriven by reason of its rolling contact with the continuously rotatedinking roll. Although the shaft of the die roll is continuously rotated,a slip clutch is provided as the coupling between the die wheel and itsshaft so that the die wheel can be intermittently held against rotationin a position where its type elements, logotype or other marking membersare out of contact with both the metering roll and the continuous webpassing over the related impression roll. In order to hold the die rollagainst rotation, the latter is provided with a projecting stop pin, andan abutment is mounted for movement into and out of the circular path ofmovement of the stop pin, such abutment being actuated by a solenoidwhich is, in turn, controlled by a switch actuated by a cam on the usualrotary cut-off of the associated wrapping machine.

The above, and other objects, features and advantages of the invention,will be apparent in the following detailed description of anillustrative embodiment thereof which is to be read in connection withthe accompanying drawings forming a part hereof, and wherein:

FIG. 1 is a diagrammatic side elevational view of a marking apparatusembodying this invention and of those elements of an associated wrappingmachine or the like which are essential for an understanding of theoperation of the marking apparatus;

FIG. 2 is an enlarged side elevational view of the mark ing apparatus ofFIG. 1, with a portion of a side wall of the housing thereof beingremoved to show the internal structure;

FIG. 3 is a sectional view taken along the line 3-3 of FIG. 2;

FIG. 4 is a detail elevational view which is partly broken away and insection and shows the arrangement for feeding ink in the apparatus ofFIGS. 1, 2 and 3;

FIG. 5 is a detail sectional view taken along the line 55 of FIG. 2; and

FIG. 6 is a wiring diagram of an electrical control circuit for themarking apparatus embodying this invention.

Referring to the drawing in detail, and initially to FIG. 1 thereof, itwill be seen that a marking apparatus em bodying the present inventionand generally identified by the reference numeral 10 is mounted, in amanner hereinafter described in detail, on a cross bar 12 extendinglaterally above the path of movement of a continuous web W of wrappingmaterial being fed through the infeed tunnel of a conventional wrappingmachine from a supply roll 14 to the usual rotary cut-oif 16 of theconventional wrapping machine. Between the supply roll 14 and the rotarycut-off 16, the web W passes over a dancer or ten sioning roll 18 whichis rotatably mounted, at its opposite ends, in pivoted arms 20, and thelatter are resiliently urged in the direction for causing the roll 18 totension the web W. After passing over the dancer or tensioning roll 18,the web W further passes over an impression roll 22, and then betweenfeed rollers 24 disposed ahead of the location of the rotary cut-off 16.The impression roll 22 and feed rollers 24 are suitably driven insynchronism with the rotation of rotary cut-off 16 so that the web W isfed, as required, to the rotary cut-01f and is there intermittently cutinto suitable sections or lengths which are to be employed for wrappingselected articles, such as, loaves of bread or the like.

Referring now to FIGS. 2 and 3, it will be seen that the markingapparatus 10 embodying this invention includes a housing which isgenerally identified by the reference numeral 26 and has opposite sidewalls 28 and 30, a cross member 32 joined to the upper edges of the sidewalls 28 and St) at the forward portion of the housing,

considered in the direction of movement of the web W indicated by thearrow 34 on FIG. 2, and a cover 36 extending across the remainder of thetop of the housing between the upper edge portions of the side walls andremovably secured to the latter, as by screws 38 having knurled heads. Afront end wall 41) is pivotally mounted adjacent its lower edge on bolts42 passing through the lower front corners of the side Walls 28 and 30and is releasably held in closed position by a spring urged detent 44(FIG. 2). The housing 26 is completed by a rear wall that includes afixed lower portion 46 secured, as by bolts 48, to the side walls 28 and30, and an upper portion 50 which is pivotally mounted adjacent itslower edge on bolts 52 passing through the side walls of the housing andwhich is releasably held in closed position by a resiliently urgeddetent (not shown) similar to the detent 44 associated with thepivotally mounted front end wall 40.

As can be seen in FIG. 2, the housing 26 is mounted from the cross bar12 by means of a generally C-shaped bracket 54 extending upwardly fromthe cross member 32 to embrace the cross bar 12 at the top and one sideof the latter, and a clamping plate 56 which is releasably securedacross the open side of the C-shaped bracket 54 by bolts 58 in order toclamp the cross bar 12 between the bracket 54 and the clamping plate 56.Further, in order to adjustably determine the position of housing 26relative to cross bar 12, the upper leg of the C-shaped bracket 54 hastwo locating screws 60 extending threadably therethrough at laterallyspaced apart locations to engage the upper surface of cross bar 12, andlock nuts 62 are provided on the set screws 60 in order to preventinadvertent rotation of the latter. It will be apparent that, bysimultaneously rotating the set screws 60, the vertical position ofhousing 26 relative to cross bar 12, and hence also relative to theimpression roll 22 which rotates about a fixed axis, can be adjusted,while the angular position of the housing relative to the cross bar andrelative to the axis of the impression roll can be varied by suitablerelative rotations of the two set screws 60.

The marking apparatus has a die wheel assembly generally identified bythe reference numeral 64 (FIGS. 2'and 3) and including a laterallyextending shaft 66 that is rotatably journalled adjacent its oppositeends in bearings 68 carried by the side walls 28 and in the forward endportions of the latter. A spur gear 70 is mounted on the end portion ofshaft 66 adjacent side wall 28, and shaft 66 is made to rotate with gear70, for example, by a pin 72 carried by the hub of gear 70 and engagingin a slot 74 extending axially in the surface of shaft 66.

The die wheel assembly 64 further includes a hollow body 76 telescopingaxially over the shaft 66 and rotatable with respect to the latter. Thehub of gear 72 is provided with an annular disc 78 (FIG. 3) of frictionmaterial which is glued or otherwise secured to the inner end face ofthe hub and frictionally engages the adjacent end surface of the diewheel body 76 so that, when the latter is urged axially toward the gear70, the die wheel body 76 tends to rotate with gear 70 and shaft 66. Inorder to urge the body 76 axially toward the gear 70, the die wheelassembly 64 further includes a helical compression spring 80 extendingaround shaft 66 and interposed axially between an abutment disc 82engaging against the bearing 68 carried by side wall 30 and a disc 84which rides against ball bearings 86 in an annular race 88 abuttingaxially against the end of body 76 remote from gear 70.

The body 76 of die wheel assembly 64 carries members for securingmarking elements which extend over only a portion of the circumferenceof the die wheel assembly. For example, as shown in FIG. 3, the outercylindrical surface of body 76 may support locking rings 90 which areshaped in the manner disclosed in US. Letters Patent No. 2,643,609issued June 30, 1953, to Ira S. Gottscho, in order to define annular,radially opening spaces therebetween for gripping suitable lockingelements formed on the back surface of rubber type elements or logotypesT having raised characters corresponding to the inked impression to beapplied to the web W. As in the above identified patent, the body 76 hasa radial flange 92 adjacent one end thereof, and a locking nut 94 isscrewed on the opposite end of the body 76 which is suitably threadedfor that purpose so that the rings 90 can be axially compacted betweenflange 92 and locking nut 94 to se curely hold the locking elements onthe back of the logotype T. It is to be understood that the housing 26of marking apparatus 10 is located with respect to the impression roll22 so that, as the die wheel assembly 64 is rotated, the raised markingsurfaces of the characters on the type elements or logotype T secured onthe periphery of the die wheel assembly by the locking rings 90 willcome into rolling and marking contact with the web W passing over theimpression roll.

In order to apply ink to the raised marking surfaces of the typeelements or logotype T secured on the periphery of the die wheelassembly 64, the marking apparatus 10 may further include an upwardlyopening ink fountain or reservoir 96 disposed in back of the die wheelassembly and having lateral, flat extensions 98 which are received indownwardly opening, elongated cutouts 100 formed in the bottom edges ofside walls 28 and 30. The forward edges of the lateral extensions 98 andof the related cutouts 100 may be beveled, or inclined with respect tothe vertical, as at 102 (FIG. 2) and a securing screw 104 extendsforwardly through a suitably tapped hole at the center of the lowerfixed portion 46 of the rear end wall of housing 26 to abut against ablock 106 projecting rearwardly from the fountain 96.

An inking roll 108 is fixed on a shaft 110 extending parallel to shaft66 of the die wheel assembly at a location above the lateral medial lineof the ink fountain 96. Shaft 110 is rotatably journalled, adjacent itsopposite ends, in bearings 112 carried by side walls 28 and 30 ofhousing 26. A gear 114 is secured on shaft 110 adjacent the innersurface of side wall 28 and meshes with an idler gear 116 which, inturn, meshes with the gear 70 on shaft 66 of the die wheel assembly. Theidler gear 116 is rotatably mounted on a bushing 118 carried by a studbolt 120 which is received in a suitably tapped bore in side wall 28.Thus, gear 70, and hence shaft 66 of the die wheel assembly, are rotatedin response to rotation of the shaft 110 of the inking roll.

The arrangement for supplying ink to the raised marking surfaces of thetype elements or logotoype T secured on the surface of the die wheelassembly further may include a metering roll 122 on a shaft 124 whichextends parallel to the axes of shafts 66 and 110 and which has itsopposite ends rotatably journalled in bearings 126 carried by arms 128(FIGS. 2 and 5) disposed against the inside surfaces of side walls 28and 30. Each of the arms 128 is pivotable about a screw 130 which passesthrough a smooth bore in the adjacent side wall 28 or 30 and is receivedin a tapped hole 132 formed in the arm 128 at a location spaced radiallyfrom the axis of shaft 124.

The inking roll 108 may include a rubber body 134 (FIGS. 3 and 4)interposed axially between metal discs or flanges 136, and the meteringroll 122 may have an axial length substantially equal to the axialdistance between the discs 136. As seen in FIG. 4, a doctor or scraperblade 138 is secured, as by screws 140 within the fountain 96 andengages the surface of the rubber body 134 of inking roll 108 at thefront side of the latter where the surface of the inking roll is movingupwardly out of the body of ink within fountain 96, thereby to scrapethe excess of ink from the inking roll prior to the transfer of ink fromthe latter to the metering roll 122.

It will be apparent that, in the described inking arrangement, themetering roll 122 mounted on the freely rotatable shaft 124 isfrictionally driven by its rolling contact with the rotated inking roll108. Further, it will be apparent that ink picked up by the inking roll108 from a body of ink within fountain 96 and transferred to themetering roll 122 is then transferred from the latter to the raisedmarking surfaces of the type elements or logotype T on the periphery ofdie wheel assembly 64 as the latter is rotated to move such markingsurfaces past the {metering roll in rolling contact with the surface ofthe atter.

In order to maintain a substantially constant supply or body of inkwithin the reservoir or fountain 96, the marking apparatus 10 mayfurther include an inverted tank or container 142 having a removableclosure 144 at its lower end from which a hollow stem or tube 146depends (FIGS. 2 and 4). A longitudinally split tube 148 may be fixedlysecured, at its upper end, in a suitable opening in the cover 36 of thehousing 26 and be dimensioned so that the stem 146, when extendeddownwardly through the longitudinally split tube 148, will befrictionally retained in the latter with the lower end of the hollowstern 146 entering into a rearward extension 150 (FIG. 3) of thefountain 96. Thus, ink can pour from the container 142 through thehollow stem 146 into fountain 96 for replenishing the supply of ink inthe latter as the ink is taken up by the inking roll 108.

The lower end edge 152 of hollow stem 146 may be cut at an acute anglewith respect to the axis of the hollow stern so that the end edge 152will be inclined from the horizontal when the container 142 is disposedin its normal operating position in which the hollow stem dependsvertically into the ink fountain.

Further, the interior of hollow stem 146 may be formed with an upwardlyfacing valve seat 154 (FIG. 4) against which a ball or check valve 156is urged by a spring 158, and a valve opening pin 160 may projectupwardly from the rearward extension 150 of the reservoir or fountain 96in axial alignment with the longitudinally split tube 148 carried by thecover 36 to unseat valve 156 when the container 142 is installed in itsoperative position with the stem 146 extending downwardly into therearward extension 150 of fountain 96.

In accordance with this invention, the inking roll 108 is positivelydriven from the associated wrapping machine or the like in synchronismwith the rotation of the rotary cut-off 16 of the latter and, for thispurpose, an end of the shaft 110 is extended outwardly through side wall28 and has a sprocket 162 fixed thereon (FIGS. 1 and 3) to be driven bya chain 164 which passes over a sprocket 163 on a rotated drive shaft165 (FIG. 1) of the associated wrapping machine. Thus, inking roll 108is continuously rotated in synchronism with the rotation of the rotarycut-off 16, and the metering roll 122 is similarly continuously rotatedby reason of its frictional contact with the inking roll. It will alsobe apparent that, by reason of the gear train formed by the gears 114,116 and 70, the shaft 66 of die wheel assembly 64 is also continuouslyrotated. The clutch disc 78 carried by gear 70 and frictionally engagingthe adjacent end of the die wheel body 76 tends to rotate the latteralong with the shaft 66. However, in the marking apparatus embodyingthis invention, the flange 92 of the wheel body 76 is provided with anaxially projecting stop pin 166 (FIGS. 2 and 3) which is directed towardthe adjacent side wall 28 and which is spaced radially from the axis ofrotation of the die wheel assembly. Further, an abutment in the form ofa pin 168 (FIGS. 2 and 5) is mounted for movement into and out of thecircular path of movement of the stop pin 166 with the die wheel body 76so that, when the pin 168 is moved into the path of movement of stop pin166, as in FIG. 2, pin 166 moves into engagement with pin 168 to preventfurther rotation of the die wheel body 76 and of the type elements orlogotype T mounted on the periphery thereof while the friction disc 78slips relative to the adjacent end surface of the die wheel body. On theother hand, when the pin 168 is moved out of the path of movement of pin166, the die wheel body 76 is then free to be rotated with shaft 66 bythe action of the clutch disc 78.

The stop pin 166 is preferably located with respect to the circumferenceof the die wheel body 76 so that, when pin 166 engages pin 168, theraised marking surfaces of the type elements or logotype T carried atthe periphery of the die wheel assembly face away from both the meteringroll 122 and the web W passing over the impression roll 22, as shown inFIG. 2, thereby to permit continued rotation of the metering roll andcontinued feeding of the web W without interference from the halted diewheel assembly. It will be apparent that, following each movement of theabutment pin 168 to its inoperative or released position out of the pathof movement of the stop pin 166, the die wheel body 76 will be free tocomplete one full revolution.

In the illustrated embodiment of the invention, the abutment pin 168extends from the lower end of a lever 170 which is pivotally mounted,intermediate its ends, on a pivot pin 172 carried by a block 174 whichis secured, as by screws 176 and 178, to the side wall 28. A tensionspring 180 is connected, at its opposite ends, to an anchor 182 providedon lever 170 above the pivot pin 172 and to an extension 184 of thescrew 178 in order to urge the lever 170 in the clockwise direction, asviewed in FIG. 2, to a position where the upper end of lever 170 restsagainst a pin 186 (FIG. 5) projecting from block 174 and where pin 168is interposed in the path of movement of the stop pin 166. Further, asolenoid 188 is mounted on the side wall 28, as by screws 190 and has amovable armature 192 which is pivotally connected, as by a pin 194, toone end of a link 196. The opposite end of link 196 is in the form of ahook 198 (FIG. 2) which extends around a pin 200 extending between thelegs of an upper bifurcated end of the lever 170.

The solenoid 188 is arranged so that, upon the energization thereof, thearmature 192 is retracted, thereby to pull the link 196 for rockinglever in the counterclockwise direction, as viewed in FIG. 2, so thatthe abutment pin 168 is then removed from the circular path of movementof the stop pin 166 and the die wheel body 76 is free to complete a fullrevolution.

In order to coordinate the operation of marking apparatus 10 with theoperation of the rotary cut-off 16 of the associated wrapping machine,the electrical circuit for energizing the solenoid 188, as shown in FIG.6, has a normally open switch 202 interposed therein, and such switch isactuated by a cam 204 (FIG. 1) secured on the shaft of the rotarycut-off 16 so that, during each revolution of the latter, andconsequently during each cut-01f of a section or length of the web W,the solenoid 188 will be energized to release the abutment pin 168 fromthe stop pin 166 and thereby permit a full revolution of the die wheelassembly 64 for applying a suitable inked impression to the web W. Atthe end of such full revolution of the die wheel assembly 64, the typeelements or logotype T, which occupy only a segment of the periphery ofthe die wheel assembly, will be returned to their normal rest positionout of contact with both the web W and the metering roll 122. It isapparent that, by controlling the operation of the marking apparatus 10from shaft of the rotary cut-off 16, the location of each inkedimpression along the web W will be positively registered with respect tothe lengths or sections cut from the web W by the rotary cut-off.

Although an illustrative embodiment of the invention has been describedin detail herein with reference to the accompanying drawings, it is tobe understood that the invention is not limited to that preciseembodiment, and that various changes and modifications may be effectedtherein without departing from the scope or spirit of the invention,except as defined in the appended claims.

What is claimed is:

l. The combination of a wrapping machine including a rotary cut-offmeans operative to cut successive sections from a continuous web duringmovement of the Web through said rotary cut-off means, which sectionsare utilized by said machine during repeated operating cycles for thewrapping of articles; and an apparatus for applying markings to thesuccessive sections of the continuous web comprising a rotatable diewheel having marking means projecting radially therefrom over a portionof the periphery of the die wheel to effect rolling and marking contactwith the web during rotation of the die Wheel, means driven by saidmachine for rotating said die wheel and including a slippable clutch, aprojecting stop member movable in synchronism with said die wheel tomove along a circular path during rotation of the latter, an abutmentmember, means mounting said abutment member for movement between anoperative position, where said abutment member extends into saidcircular path to block rotation of said die wheel with said markingmeans facing away from said web and while said clutch slips, and aninoperative position where said abutment member is withdrawn from saidcircular path to free said die wheel for rotation, resilient meansurging said abutment member to said operative position,electromagnetically actuated means energizable to move said abutmentmember to said operative position, circuit means for energizing saidelectromagnetically actuated means including a normally open switch, andcam means rotated in synchronism with said rotary cut-off means andoperative to momentarily close said switch for only momentarily movingsaid abutment to its inoperative position during the cutting 01f of eachsection from the web, said abutment member being mounted at one end of alever which is pivotally supported intermediate its ends, and saidelectromagnetically actuated means including a solenoid having anormally extended armature which is retracted upon energization of thesolenoid, a link pivotally connected, at one end, to said armature andhaving a hook-shaped configuration at the other end opening generally inthe longitudinal direction of the retracting movement of the armature,and a pin projecting from the other end of said lever and received insaid hook-shaped end of the link to cause rocking of the lever in thedirection moving said abutment member to its inoperative position uponenergization of said solenoid.

2. The combination as in claim 1; wherein said stop 8 member andabutment member have cylindrical surfaces with parallel axes so thatsaid abutment member can cam over said stop member during the initialrotation of said die wheel following the momentary energization of saidsolenoid.

References Cited in the file of this patent UNITED STATES PATENTS2,061,893 Cady Nov. 24, 1936 2,205,838 Redd June 25, 1940 2,362,736Weiss Nov. 14, 1944 2,435,369 Simonds Feb. 3, 1948 2,743,671 Weber etal. May 1, 1956 2,782,712 Clatf et al. Feb. 26, 1957 2,812,938 Haskin etal. Nov. 12, 1957 2,963,965 Baumgartner Dec. 13, 1960

1. THE COMBINATION OF A WRAPPING MACHIEN INCLUDING A ROTARY CUT-OFFMEANS OPERATIVE TO CUT SUCCESSIVE SECTIONS FROM A CONTINUOUS WEB DURINGMOVEMENT OF THE WEB THROUGH SAID ROTARY CUT-OFF MEANS, WHICH SECTIONSARE UTILIZED BY SAID MACHINE DURING REPEATED OPERATING CYCLES FOR THEWRAPPING OF ARTICLES; AND AN APPARATUS FOR APPLYING MARKINGS TO THESUCCESSIVE SECTIONS OF THE CONTINUOUS WEB COMPRISING A ROTATABLE DIEWHEEL HAVING MARKING MEANS PROJECTING RADIALLY THEREFROM OVER A PORTIONOF THE PERIPHERY OF THE DIE WHEEL TO EFFECT ROLLING AND MARKING CONTACTWITH THE WEB DURING ROTATION OF THE DIE WHEEL, MEANS DRIVEN BY SAIDMACHINE FOR ROTATING SAID DIE WHEEL AND INCLUDING A SLIPPABLE CLUTCH, APROJECTING STOP MEMBER MOVABLE IN SYNCHRONISM WITH SAID DIE WHEEL TOMOVE ALONG A CIRCULAR PATH DURING ROTATION OF THE LATTER, AN ABUTMENTMEMBER, MEANS MOUNTING SAID ABUTMENT MEMBER FOR MOVEMENT BETWEEN ANOPERATIVE POSITION, WHERE SAID ABUTMENT MEMBER EXTENDS INTO SAIDCIRCULAR PATH TO BLOCK ROTATION OF SAID DIE WHEEL WITH SAID MARKINGMEANS FACING AWAY FROM SAID WEB AND WHILE SAID CLUTCH SLIPS, AND ANINOPERATIVE POSITION WHERE SAID ABUTMENT MEMBER IS WITHDRAWN FROM SAIDCIRCULAR PATH TO FREE SAID DIE WHEEL FOR ROTATION, RESILIENT MEANSURGING SAID ABUTMENT MEMBER TO SAID OPERATIVE POSITION,ELECTROMAGNETICALLY ACTATED MEANS ENERGIZABLE TO MOVE SAID ABUTMENTMEMBER TO SAID OPERATIVE POSITION, CIRCUIT MEANS FOR ENERGIZING SAIDELECTROMAGNETICALLY ACTUATED MEANS INCLUDING A NORMALLY OPEN SWITCH, ANDCAM MEANS ROTATED IN SYNCHRONISM WITH SAID ROTARY CUT-OFF MEANS ANDOPERATIVE TO MOMENTARILY CLOSE SAID SWITCH FOR ONLY MOMENTARILY MOVINGSAID ABUTMENT TO ITS INOPERATIVE POSITION DURING THE CUTTING OFF OF EACHSECTION FROM THE WEB, SAID ABUTMENT MEMBER BEING MOUNTED AT ONE END OF ALEVER WHICH IS PIVOTALLY SUPPORTED INTERMEDIATE ITS ENDS, AND SAIDELECTROMAGNETICALLY ACTUATED MEANS INCLUDING A SOLENOID HAVING ANORMALLY EXTENDED ARMATURE WHICH IS RETRACTED UPON ENERGIZATION OF THESOLENOID, A LINK PIVOTALLY CONNECTED, AT ONE END, TO SAID ARMATURE ANDHAVING A HOOK-SHAPED CONFIGURATION AT THE OTHER END OPENING GENERALLY INTHE LONGITUDINAL DIRECTION OF THE RETRACTING MOVEMENT OF THE ARMATURE,AND A PIN PROJECTING FROM THE OTHER END OF SAID LEVER AND RECEIVED INSAID HOOK-SHAPED END OF THE LINK TO CAUSE ROCKING OF THE LEVER IN THEDIRECTION MOVING SAID ABUTMENT MEMBER TO ITS INOPERATIVE POSITION UPONENERGIZATION OF SAID SOLENOID.